SU1536367A1 - Information input device - Google Patents

Abstract

The invention relates to automation and computing and can be used to enter information from a keyboard into control units. The aim of the invention is to simplify the device. The device contains a block of switching elements 1, a filter block 2, a group of triggers 3, first 4 and second 6 elements OR NOT, element 5, first 7 and second 8 switching elements, counting trigger 9, information outputs 10 of the device. The device protects the clock inputs of the triggers from interference and uses a simple operating mode control scheme. 3 il.

Description

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The invention relates to automation and computing and can be used to enter information from a keyboard into control units. The purpose of the invention is to simplify the device and increase its reliability.

FIG. 1 shows a functional diagram of the device; Fig. 2 shows examples of the execution of a counting trigger, a low-pass filter, switching elements; in fig. 3 - time diagrams of work.

The information input device (Fig. 1 contains a block 1 of switching elements (buttons) s filter block 2, a group of triggers 3Й-3П, the first element OR-NOT 4, the element AND 5, the second element OR-NOT 6, the first 7 and the second 8 switching elements (buttons), counting trigger 9, outputs 10a-10p for Za-3p triggers,

The device works as follows.

The two states of trigger 9 correspond to two modes of operation of the device. If the output of the trigger is level 9 O, the remote control operates in the memory mode and reset when the switching element (button) I O „is pressed again (mode 1). If the output of the trigger 9 is level 1, the remote control operates in the memory free mode (Mode 2) Mode switching occurs each time the switching element 7 is pressed. Mode I is used to form combined signals that are stored even after the start of the buttons 1a-1h (equivalent to the P2K switch with independent function). Mode 2 is used to form unitary signals that, while the la (In) button is pressed (equivalent to the P2K switch without latching).

In mode J, the output of element 5 is set to level o, since its input is supplied with level o from trigger 9. In the initial state of button 3, both inputs of the element OR NOT 6 are set to level o, therefore its output is set to level g, which corresponds to the absence of a reset signal for triggers Za-3g. When the button 1M (1P) is pressed, its level 1 appears (Fig. 3), which passes through the filter 2 Q (2 ") to the counting input of the trigger 3 a (3"), which switches in this case. With

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pressing the 1aOc button again) the trigger 3q (3n) is reset. Elements OR-NOT 4 and 5 are not involved in the work. As a result, an independent activation of the triggers Zd, Zn and their reset when the corresponding button is pressed again is triggered. The signals from the Zp triggers are output at the output, and the state of the triggers is indicated by indicators 16. switching of unselected triggers from crosstalk from neighboring circuits (interference in FIG. 3 is marked with a sign).

A quick reset of all the triggers is done by pressing the button 8. When the output of the button 8 is level 1, the output of the ORID 6 element is O, which is a reset signal for the triggers 3-3

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In mode 2, trigger 9 output to input element AND 5 is fed level 1. In the initial state of buttons 1e, -1 „all inputs of element OR NOT 4 are set to O, therefore output 4 is set to level 1. At level 1 At both inputs of the element AND 5, the output of this element is set to level 1, and at the output of the element OR NONE 6, the level O, which is a reset signal for the Back and Back triggers. Consequently, in the initial state of the buttons 1 o, (1 n) all the triggers 3e-3p are reset. When pressing the button „(„) at the output of the element OR NONE 4, level O appears, which results in the appearance of level 1 at the output of the element OR NONE 6, i.e. the trigger reset signal is removed. Turn off reset occurs with a delay created by elements 4-6 (50 not). Level 1 from button 1a (1 „) goes through filter 2a (2„) to the counting input of trigger 3a (Sn) with a delay created by filter 2ga (2P) and which must be greater than the total delay of elements 4-6 (see fig. H). The delayed front of the signal from the button 1a (1P) triggers the trigger 3 (3p). When releasing the button 1a (1p), at the output of the element OR-NOT 6, the level O appears, which resets the trigger Over (3p). As a result, the operation mode without memory is provided - signal 1 at the output of the USB, (Jup) is present while

button 1a is pressed (1 „). Filters 2c-2n provide not only the necessary edge delay of the signals from the buttons, but also suppress crosstalk g interference from adjacent circuits.

Thus, the device protects the clock inputs of the ZA-3 flip-flops from interference, it is possible to use single-pole buttons (including touch-sensitive contacts that do not contain mechanical elements), a simple system for controlling the console operation mode is used.

Claims (1)

Invention Formula A device for entering information containing a block of switching elements, a group of triggers, element AND, characterized in that, in order to simplify the device, the first and second switching f LJW7- g five 0 elements, a counting trigger, the first .and the second OR-NOT, a filter block whose inputs are connected to the outputs of the switching elements block and the corresponding inputs of the first IPI-NE element whose output is connected to the first input of the And element, the second input of which is connected to the output the counting trigger, the clock input of which is connected to the output of the first switching element, the output of the element AND is connected to the first input of the second element OR NOT, the second input of which is connected to the output of the second - switching element, the output of the second second OR-NO element is connected to the reset inputs of flip-flops group, clock inputs of which are connected to respective outputs of the filter unit, the outputs of flip-flops groups are information device outputs. Fsh.g J1 Riding -, J S-SSSKEZ. 1ygyyu about glK1y- "that 73I 1C g five 1azhg alshvgkhii "vvga pass" titdsd te-tnJ So w tawciTj .SSSfOKa augger (c - «1alzse kg11-1Јкз jl Mode I i .-; d..m LISH111GI | YU DCBS P. .Tltt.